Coffee Shop Restroom Rough-In: Plumbing Clearances Versus Accessibility
During rough-in of a new 1,850 sq ft coffee shop, the inspector measures the two restrooms. The women's room has two water closets and one lavatory; the men's room has one water closet, one urinal and one lavatory. Measured in the women's room: water closet centerline 14 inches from the finished sidewall; lavatory centerline 13 inches from the opposite sidewall; one compartment 30 inches wide by 58 inches deep with grab bar blocking at 34 inches above the floor; the second compartment 58 inches wide by 60 inches deep with the water closet centerline 18 inches from the sidewall and a 30-inch door swinging inward. The lavatory rim is at 33 inches with 27 inches of knee clearance. The contractor says the plans were approved as drawn, the 14-inch dimension is "grandfathered because the layout came from the tenant's prototype," and a 1-inch furring strip on that wall would "fix everything." The plans show an occupant load of 96.
1. Distinguish which measurements violate the plumbing code and which violate the accessibility standard, stating the governing rule for each.
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Plumbing code first, because it governs every fixture in the room:
- Water closet centerline 14 inches from the sidewall: the plumbing code requires a minimum clearance from the centerline of the fixture to the sidewall (typically 15 inches). 14 inches is a violation.
- Lavatory centerline 13 inches from the sidewall: the same minimum-centerline rule applies to lavatories. Violation.
- Compartment 30 inches by 58 inches: the plumbing code minimum compartment is 30 inches wide by 60 inches deep. The 58-inch depth is a violation.
Accessibility standard (ICC A117.1) governs the accessible elements:
- The second compartment's 18-inch water closet centerline is correct (the permitted range is 16 to 18 inches).
- The accessible compartment must be sized per the standard (commonly 60 inches wide by 59 to 60 inches deep for a floor-mounted water closet), so the 58-inch width is short.
- A door swinging into an accessible compartment is not permitted; it must swing out or be a folding door.
- Lavatory knee clearance of 27 inches is below the required clear height under the apron (29 inches), so this is a violation and will also fail the reach/clearance check.
- Grab bar blocking at 34 inches is within the acceptable band; the blocking itself must be verified for the bar locations.
2. Evaluate the contractor's two arguments ("approved plans" and "a 1-inch furring strip fixes it") and describe how to resolve this without stalling the job.
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Approval of a plan does not authorize a code violation. An inspector who sees a measurable violation in the field must write it up even if the drawing shows it; the plan review error and the field condition are separate problems, and the obligation runs to the code, not to the stamp on the sheet.
The furring strip is a legitimate field fix only if it is engineered, not improvised. Adding 1 inch of furring to that wall moves the finished surface, so the water closet centerline becomes 15 inches and satisfies the plumbing minimum. Before accepting it, verify side effects: the closet flange and drain must be set relative to the new finished floor and wall; the water supply stub-out length and escutcheon; the room's clear dimension and the door swing; the grab bar blocking depth; and the moisture barrier and tile substrate detail. The same detail applied to the cleanout or a fixture served on the other side of that wall could create a new problem.
The correct closeout is a correction notice, a revised detail or sketch from the designer documenting the furring and the recalculated dimensions, and a re-inspection of the fixtures after the wall is finished. Document the resolution in the permit file so the next inspector does not re-litigate it.
3. How should the inspector verify fixture counts for 96 occupants, and what is the proper action if the installed count appears short?
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Fixture count is established at plan review, not invented in the field. The occupant load comes from the building official under the building code; the plumbing code's fixture table is then applied by sex, usually assuming an even split unless the design documents justify another ratio, using the ratios for the applicable occupancy classification. The inspector's field job is to confirm that what is installed matches the approved plans, the classification used, and the accessibility requirements for the count provided.
If the count appears short, do not recalculate the building's occupancy on the tailgate of a truck. Instead: (1) write a correction notice identifying the shortfall and the basis; (2) route it to plan review and the building official, since occupant load and classification are their determinations; (3) require the designer to resolve it, either by adding fixtures or by documented justification. Note also that single-user toilet rooms can affect how fixtures are counted and who may use them, so confirm how the plans handled that allowance before assuming the count fails. Record the disposition, because a later tenant change will reopen the same question.